/* ═══════════════════════════════════════════════
   光湖知识库 · 主样式
   设计基线：简洁、深色主题、阅读友好
   ═══════════════════════════════════════════════ */

:root {
  --kb-bg: #f7f8fb;
  --kb-bg-secondary: #101723;
  --kb-bg-tertiary: #1a2433;
  --kb-border: #dfe3eb;
  --kb-text: #202632;
  --kb-text-muted: #71798a;
  --kb-accent: #277d91;
  --kb-accent-hover: #1f6b7d;
  --kb-danger: #f85149;
  --kb-success: #3fb950;
  --kb-warning: #d29922;
  --kb-font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  --kb-font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  --kb-sidebar-width: 286px;
  --kb-header-height: 64px;
  --kb-radius: 10px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--kb-font-sans);
  background: var(--kb-bg);
  color: var(--kb-text);
  line-height: 1.6;
  overflow: hidden;
}

/* ─── 布局 ─── */

.kb-app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.kb-header {
  -webkit-app-region: drag;
  height: var(--kb-header-height);
  display: flex;
  align-items: center;
  padding: 0 18px 0 78px;
  border-bottom: 1px solid #263143;
  background: var(--kb-bg-secondary);
  gap: 12px;
  flex-shrink: 0;
}

.kb-header button,
.kb-header input,
.kb-header a {
  -webkit-app-region: no-drag;
}

.kb-header-left {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.kb-header-center {
  flex: 1;
  display: flex;
  justify-content: center;
}

.kb-header-right {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.kb-title {
  font-size: 15px;
  line-height: 1.1;
  font-weight: 650;
  letter-spacing: .02em;
  color: #f4f7fb;
  white-space: nowrap;
}

.kb-body {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* ─── 侧栏 ─── */

.kb-sidebar {
  width: var(--kb-sidebar-width);
  border-right: 1px solid #263143;
  background: var(--kb-bg-secondary);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  flex-shrink: 0;
}

.kb-sidebar-actions {
  padding: 12px;
  border-bottom: 1px solid var(--kb-border);
}

/* ─── 文档树 ─── */

.kb-tree {
  overflow-y: auto;
  padding: 8px 0;
  flex: 1;
}

.kb-tree-item {
  display: flex;
  align-items: center;
  padding: 6px 12px;
  cursor: pointer;
  gap: 6px;
  font-size: 13px;
  transition: background 0.15s;
  position: relative;
}

.kb-tree-item:hover {
  background: var(--kb-bg-tertiary);
}

.kb-tree-item.active {
  background: var(--kb-bg-tertiary);
  color: var(--kb-accent);
}

.kb-tree-icon {
  font-size: 14px;
  flex-shrink: 0;
}

.kb-tree-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.kb-tree-add {
  display: none;
  background: none;
  border: 1px solid var(--kb-border);
  color: var(--kb-text-muted);
  border-radius: 3px;
  width: 20px;
  height: 20px;
  cursor: pointer;
  font-size: 12px;
  line-height: 1;
}

.kb-tree-folder-header:hover .kb-tree-add {
  display: flex;
  align-items: center;
  justify-content: center;
}

.kb-tree-add:hover {
  color: var(--kb-accent);
  border-color: var(--kb-accent);
}

/* ─── 内容区 ─── */

.kb-content {
  flex: 1;
  overflow-y: auto;
  padding: 0;
  background: radial-gradient(circle at 88% 6%, rgba(78, 178, 190, .08), transparent 28%), var(--kb-bg);
}

/* ─── 编辑器 ─── */

.kb-editor {
  max-width: 820px;
  margin: 0 auto;
  padding: 72px 34px 120px;
}

.kb-editor-meta {
  display: flex;
  gap: 16px;
  font-size: 12px;
  color: var(--kb-text-muted);
  margin-bottom: 20px;
  padding-bottom: 0;
  border-bottom: none;
}

.kb-editor-title {
  font-family: ui-serif, 'Songti SC', 'STSong', Georgia, serif;
  font-size: clamp(36px, 4vw, 50px);
  font-weight: 650;
  letter-spacing: -.035em;
  color: #18202d;
  margin-bottom: 16px;
  cursor: pointer;
  line-height: 1.3;
}

.kb-editor-title:hover {
  color: var(--kb-accent);
}

.kb-editor-title-input {
  width: 100%;
  font-size: 28px;
  font-weight: 700;
  background: var(--kb-bg-tertiary);
  border: 1px solid var(--kb-border);
  color: var(--kb-text);
  padding: 8px 12px;
  border-radius: var(--kb-radius);
  margin-bottom: 12px;
}

.kb-editor-toolbar {
  display: flex;
  gap: 8px;
  margin-bottom: 30px;
}

.kb-editor-edit-pane {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  min-height: 500px;
}

.kb-editor-textarea {
  width: 100%;
  min-height: 500px;
  background: var(--kb-bg-tertiary);
  border: 1px solid var(--kb-border);
  color: var(--kb-text);
  padding: 16px;
  border-radius: var(--kb-radius);
  font-family: var(--kb-font-mono);
  font-size: 14px;
  line-height: 1.7;
  resize: vertical;
  outline: none;
}

.kb-editor-textarea:focus {
  border-color: var(--kb-accent);
}

.kb-editor-preview-pane,
.kb-editor-read-pane {
  overflow-y: auto;
}

.kb-editor-read-pane {
  padding: 0;
}

/* ─── Markdown 渲染 ─── */

.kb-markdown-render {
  font-family: ui-serif, 'Songti SC', 'STSong', Georgia, serif;
  font-size: 17px;
  line-height: 1.9;
  color: var(--kb-text);
}

.kb-markdown-render h1 { font-size: 2em; margin: 1.4em 0 0.5em; border-bottom: none; padding-bottom: 0; color: #18202d; }
.kb-markdown-render h2 { font-size: 1.5em; margin: 1.4em 0 0.5em; border-bottom: none; padding-bottom: 0; color: #18202d; }
.kb-markdown-render h3 { font-size: 1.25em; margin: 1em 0 0.5em; }
.kb-markdown-render p { margin: 0.8em 0; }
.kb-markdown-render ul, .kb-markdown-render ol { margin: 0.8em 0; padding-left: 2em; }
.kb-markdown-render li { margin: 0.3em 0; }
.kb-markdown-render blockquote {
  border-left: 3px solid var(--kb-accent);
  padding: 0.5em 1em;
  margin: 1em 0;
  background: #eef5f6;
  color: var(--kb-text-muted);
}
.kb-markdown-render code {
  background: #edf0f4;
  padding: 2px 6px;
  border-radius: 3px;
  font-family: var(--kb-font-mono);
  font-size: 0.9em;
}
.kb-markdown-render pre {
  background: #17202c;
  color: #eef4f8;
  padding: 16px;
  border-radius: var(--kb-radius);
  overflow-x: auto;
  margin: 1em 0;
}
.kb-markdown-render pre code {
  background: none;
  padding: 0;
}
.kb-markdown-render table {
  border-collapse: collapse;
  width: 100%;
  margin: 1em 0;
}
.kb-markdown-render th, .kb-markdown-render td {
  border: 1px solid var(--kb-border);
  padding: 8px 12px;
  text-align: left;
}
.kb-markdown-render th {
  background: var(--kb-bg-tertiary);
  font-weight: 600;
}
.kb-markdown-render a {
  color: var(--kb-accent);
  text-decoration: none;
}
.kb-markdown-render a:hover {
  text-decoration: underline;
}
.kb-markdown-render img {
  max-width: 100%;
  border-radius: var(--kb-radius);
}
.kb-markdown-render hr {
  border: none;
  border-top: 1px solid var(--kb-border);
  margin: 2em 0;
}

/* ─── 搜索 ─── */

.kb-search {
  position: relative;
  width: 100%;
  max-width: 480px;
}

.kb-search-input-wrap {
  display: flex;
  align-items: center;
  background: var(--kb-bg-tertiary);
  border: 1px solid var(--kb-border);
  border-radius: var(--kb-radius);
  padding: 0 10px;
  gap: 6px;
}

.kb-search-input-wrap:focus-within {
  border-color: var(--kb-accent);
}

.kb-search-icon {
  font-size: 14px;
  flex-shrink: 0;
}

.kb-search-input {
  flex: 1;
  background: none;
  border: none;
  color: var(--kb-text);
  padding: 8px 0;
  font-size: 14px;
  outline: none;
}

.kb-search-input::placeholder {
  color: var(--kb-text-muted);
}

.kb-search-clear {
  background: none;
  border: none;
  color: var(--kb-text-muted);
  cursor: pointer;
  font-size: 14px;
  padding: 2px 4px;
}

.kb-search-loading {
  color: var(--kb-text-muted);
  font-size: 12px;
}

.kb-search-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--kb-bg-secondary);
  border: 1px solid var(--kb-border);
  border-radius: var(--kb-radius);
  margin-top: 4px;
  max-height: 360px;
  overflow-y: auto;
  z-index: 100;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}

.kb-search-result {
  padding: 10px 14px;
  cursor: pointer;
  border-bottom: 1px solid var(--kb-border);
}

.kb-search-result:last-child {
  border-bottom: none;
}

.kb-search-result:hover {
  background: var(--kb-bg-tertiary);
}

.kb-search-result-title {
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 2px;
}

.kb-search-result-path {
  font-size: 11px;
  color: var(--kb-text-muted);
  margin-bottom: 4px;
}

.kb-search-result-snippet {
  font-size: 12px;
  color: var(--kb-text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.kb-search-empty {
  padding: 16px;
  text-align: center;
  color: var(--kb-text-muted);
  font-size: 13px;
}

/* ─── 版本历史 ─── */

.kb-history {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 32px;
}

.kb-history-title {
  font-size: 22px;
  margin-bottom: 8px;
}

.kb-history-hint {
  color: var(--kb-text-muted);
  font-size: 13px;
  margin-bottom: 20px;
}

.kb-history-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.kb-history-entry {
  display: flex;
  align-items: center;
  padding: 10px 14px;
  border-radius: var(--kb-radius);
  background: var(--kb-bg-secondary);
  border: 1px solid var(--kb-border);
  gap: 8px;
}

.kb-history-entry.selected {
  border-color: var(--kb-accent);
  background: var(--kb-bg-tertiary);
}

.kb-history-entry-main {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  font-size: 13px;
}

.kb-history-hash {
  font-family: var(--kb-font-mono);
  font-size: 12px;
  color: var(--kb-accent);
  background: var(--kb-bg-tertiary);
  padding: 2px 6px;
  border-radius: 3px;
  flex-shrink: 0;
}

.kb-history-message {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.kb-history-date {
  color: var(--kb-text-muted);
  font-size: 12px;
  flex-shrink: 0;
}

.kb-history-author {
  color: var(--kb-text-muted);
  font-size: 12px;
  flex-shrink: 0;
}

.kb-history-preview,
.kb-history-diff {
  margin-top: 20px;
  border: 1px solid var(--kb-border);
  border-radius: var(--kb-radius);
  overflow: hidden;
}

.kb-history-preview-header,
.kb-history-diff-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: var(--kb-bg-tertiary);
  border-bottom: 1px solid var(--kb-border);
  font-size: 13px;
}

.kb-history-preview-header button,
.kb-history-diff-header button {
  margin-left: auto;
}

.kb-history-preview-content {
  padding: 16px;
  font-family: var(--kb-font-mono);
  font-size: 13px;
  line-height: 1.6;
  white-space: pre-wrap;
  overflow-x: auto;
  max-height: 400px;
}

.kb-history-diff-stats {
  font-family: var(--kb-font-mono);
  font-size: 12px;
  color: var(--kb-success);
}

.kb-diff-hunk {
  border-bottom: 1px solid var(--kb-border);
}

.kb-diff-line {
  padding: 2px 14px;
  font-family: var(--kb-font-mono);
  font-size: 13px;
  line-height: 1.6;
  white-space: pre;
}

.kb-diff-line.add {
  background: rgba(63, 185, 80, 0.15);
  color: var(--kb-success);
}

.kb-diff-line.del {
  background: rgba(248, 81, 73, 0.15);
  color: var(--kb-danger);
}

.kb-diff-line.ctx {
  color: var(--kb-text-muted);
}

/* ─── 通用按钮 ─── */

.kb-btn-icon {
  background: none;
  border: none;
  color: var(--kb-text-muted);
  cursor: pointer;
  font-size: 16px;
  padding: 4px 8px;
  border-radius: var(--kb-radius);
}

.kb-btn-icon:hover {
  color: var(--kb-text);
  background: var(--kb-bg-tertiary);
}

.kb-btn-danger:hover {
  color: var(--kb-danger) !important;
}

.kb-btn-primary {
  background: var(--kb-accent);
  color: #fff;
  border: none;
  padding: 6px 16px;
  border-radius: var(--kb-radius);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
}

.kb-btn-primary:hover {
  background: var(--kb-accent-hover);
}

.kb-btn-secondary {
  background: var(--kb-bg-tertiary);
  color: var(--kb-text);
  border: 1px solid var(--kb-border);
  padding: 6px 16px;
  border-radius: var(--kb-radius);
  cursor: pointer;
  font-size: 13px;
}

.kb-btn-secondary:hover {
  border-color: var(--kb-text-muted);
}

.kb-btn-small {
  background: var(--kb-bg-tertiary);
  color: var(--kb-text-muted);
  border: 1px solid var(--kb-border);
  padding: 4px 10px;
  border-radius: var(--kb-radius);
  cursor: pointer;
  font-size: 12px;
  white-space: nowrap;
}

.kb-btn-small:hover {
  color: var(--kb-text);
  border-color: var(--kb-text-muted);
}

.kb-btn-tab {
  background: none;
  border: none;
  color: var(--kb-text-muted);
  cursor: pointer;
  padding: 6px 12px;
  border-radius: var(--kb-radius);
  font-size: 13px;
}

.kb-btn-tab:hover {
  background: var(--kb-bg-tertiary);
  color: var(--kb-text);
}

.kb-btn-tab.active {
  background: var(--kb-bg-tertiary);
  color: var(--kb-accent);
  font-weight: 600;
}

/* ─── 空状态 / 错误 / 加载 ─── */

.kb-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--kb-text-muted);
  gap: 8px;
}

.kb-empty-icon {
  font-size: 48px;
  margin-bottom: 8px;
}

.kb-empty-hint {
  font-size: 13px;
}

.kb-error {
  background: rgba(248, 81, 73, 0.1);
  border: 1px solid var(--kb-danger);
  color: var(--kb-danger);
  padding: 10px 16px;
  margin: 16px;
  border-radius: var(--kb-radius);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
}

.kb-error button {
  background: none;
  border: none;
  color: var(--kb-danger);
  cursor: pointer;
  font-size: 16px;
}

.kb-loading {
  padding: 24px;
  text-align: center;
  color: var(--kb-text-muted);
}

.kb-history-loading {
  padding: 24px;
  color: var(--kb-text-muted);
}

/* ─── 滚动条 ─── */

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--kb-border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--kb-text-muted);
}

/* ─── HoloLake 0.5.1 知识空间外观 ─── */

.kb-brand-mark {
  width: 27px;
  height: 27px;
  border: 1px solid rgba(140, 229, 235, .55);
  border-radius: 50%;
  position: relative;
  box-shadow: inset 0 0 14px rgba(74, 192, 202, .15), 0 0 18px rgba(74, 192, 202, .12);
}

.kb-brand-mark::before,
.kb-brand-mark::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  border: 1px solid rgba(140, 229, 235, .42);
  border-radius: 50%;
  transform: translate(-50%, -50%) rotate(-20deg);
}
.kb-brand-mark::before { width: 34px; height: 11px; }
.kb-brand-mark::after { width: 5px; height: 5px; background: #a6f2ed; border: 0; }

.kb-subtitle {
  margin-top: 3px;
  color: #77869a;
  font-size: 9px;
  letter-spacing: .18em;
}

.kb-header .kb-btn-icon,
.kb-header .kb-btn-tab { color: #aab5c3; }
.kb-header .kb-btn-tab:hover { color: #f4f7fb; }
.kb-header .kb-btn-tab.active { color: #9ee5e4; }

.kb-search-input-wrap {
  background: rgba(255,255,255,.055);
  border-color: #303c4d;
  border-radius: 9px;
}
.kb-search-input { color: #edf2f7; }

.kb-workspace-label,
.kb-tree-heading {
  color: #647287;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.kb-workspace-label { padding: 22px 18px 7px; }
.kb-tree-heading { padding: 16px 18px 4px; }
.kb-sidebar-actions { display: grid; gap: 8px; border-bottom: 0; padding: 8px 12px; }
.kb-btn-import,
.kb-btn-new {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 9px;
  border-radius: 8px;
  padding: 9px 11px;
  cursor: pointer;
  font-size: 12px;
  text-align: left;
}
.kb-btn-import {
  border: 1px solid rgba(110, 209, 214, .34);
  color: #dff7f5;
  background: linear-gradient(135deg, rgba(30,127,139,.32), rgba(29,65,89,.28));
}
.kb-btn-import:hover { border-color: rgba(140, 229, 235, .7); background: rgba(34,132,143,.38); }
.kb-btn-new { border: 1px solid #2b3748; color: #aeb9c7; background: rgba(255,255,255,.025); }
.kb-btn-new:hover { color: #f1f5f8; background: rgba(255,255,255,.06); }
.kb-btn-import:disabled,
.kb-btn-new:disabled { opacity: .55; cursor: wait; }
.kb-btn-import-icon { font-size: 17px; line-height: 1; }
.kb-import-message {
  margin: 2px 12px 5px;
  padding: 8px 10px;
  border-radius: 7px;
  background: rgba(44, 143, 150, .12);
  color: #8cced0;
  font-size: 10px;
  line-height: 1.5;
}

.kb-tree { color: #aeb8c7; padding: 2px 8px 16px; }
.kb-tree-item { margin: 1px 0; padding: 7px 9px; border-radius: 7px; }
.kb-tree-item:hover { background: rgba(255,255,255,.055); }
.kb-tree-item.active { background: rgba(53, 152, 164, .17); color: #b4eeee; }
.kb-tree-chevron { color: #637186; font-size: 17px; line-height: 12px; transform-origin: center; transition: transform .15s; }
.kb-tree-chevron.expanded { transform: rotate(90deg); }
.kb-tree-folder-icon { width: 13px; height: 9px; border: 1px solid #77869b; border-radius: 2px; position: relative; }
.kb-tree-folder-icon::before { content: ''; position: absolute; width: 6px; height: 3px; left: 0; top: -4px; border: 1px solid #77869b; border-bottom: 0; border-radius: 2px 2px 0 0; }
.kb-tree-doc-icon { width: 11px; height: 14px; border: 1px solid #77869b; border-radius: 2px; position: relative; }
.kb-tree-doc-icon::after { content: ''; position: absolute; width: 5px; height: 1px; left: 2px; top: 5px; background: #77869b; box-shadow: 0 3px 0 #77869b; }

.kb-page-symbol {
  width: 45px;
  height: 45px;
  display: grid;
  place-items: center;
  margin-bottom: 28px;
  border-radius: 12px;
  color: #2b8997;
  font-size: 23px;
  background: linear-gradient(145deg, #e9f6f6, #f4f7fb);
  box-shadow: inset 0 0 0 1px rgba(39,125,145,.12);
}
.kb-editor-author { display: none; }
.kb-editor-toolbar { opacity: .65; transition: opacity .15s; }
.kb-editor:hover .kb-editor-toolbar { opacity: 1; }

.kb-empty { padding: 36px; }
.kb-empty-card {
  width: min(590px, 100%);
  padding: 56px 62px;
  border: 1px solid #e0e5ec;
  border-radius: 24px;
  background: rgba(255,255,255,.82);
  box-shadow: 0 24px 60px rgba(26, 38, 55, .08);
  text-align: center;
}
.kb-empty-orbit { width: 72px; height: 72px; margin: 0 auto 28px; border: 1px solid rgba(39,125,145,.32); border-radius: 50%; position: relative; }
.kb-empty-orbit::before { content: ''; position: absolute; width: 92px; height: 28px; border: 1px solid rgba(39,125,145,.28); border-radius: 50%; left: -11px; top: 21px; transform: rotate(-22deg); }
.kb-empty-orbit span { position: absolute; width: 9px; height: 9px; border-radius: 50%; background: #318d9a; left: 31px; top: 31px; box-shadow: 0 0 18px rgba(49,141,154,.55); }
.kb-empty-eyebrow { color: #3b8994; font-size: 10px; font-weight: 750; letter-spacing: .2em; }
.kb-empty-card h2 { margin: 10px 0 14px; color: #17202c; font-family: ui-serif, 'Songti SC', Georgia, serif; font-size: 30px; line-height: 1.25; }
.kb-empty-card > p:not(.kb-empty-eyebrow) { max-width: 440px; margin: 0 auto; color: #697284; font-size: 14px; line-height: 1.8; }
.kb-empty-primary { margin-top: 28px; border: 0; border-radius: 10px; padding: 12px 21px; color: white; background: #237c8b; cursor: pointer; font-weight: 650; box-shadow: 0 9px 22px rgba(35,124,139,.22); }
.kb-empty-primary:hover { background: #1c6a77; }
.kb-empty-support { margin-top: 14px; color: #939aaa; font-size: 11px; }

.kb-agent-panel { border-left-color: #dbe1e8; background: #f4f6f9; }
.agent-header,
.runtime-status { background: #111925; border-color: #293446; color: #e9eef4; }
.agent-meta h3,
.model-config input,
.model-config button,
.forgejo-url,
.forgejo-actions button { color: #e9eef4; }
.agent-role,
.runtime-tools,
.forgejo-title span,
.forgejo-detail { color: #8190a4; }
.model-config,
.forgejo-status { background: #17212f; border-color: #2c394b; }
.model-config input,
.forgejo-url { background: #0e1621; border-color: #2c394b; }
.forgejo-actions button { background: #202c3b; border-color: #344155; }

/* ═══════════════════════════════════════════════
   Agent 面板
   ═══════════════════════════════════════════════ */

.kb-btn-agent {
  margin-left: 8px;
  background: linear-gradient(135deg, #1a5f7a 0%, #0d3b66 100%);
  border: 1px solid rgba(88, 166, 255, 0.3);
}

.kb-btn-agent.active {
  background: linear-gradient(135deg, #2980b9 0%, #1a5f7a 100%);
  border-color: var(--kb-accent);
  box-shadow: 0 0 12px rgba(88, 166, 255, 0.2);
}

.kb-agent-panel {
  width: 380px;
  min-width: 320px;
  max-width: 480px;
  border-left: 1px solid var(--kb-border);
  background: var(--kb-bg);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

/* ─── AgentChat 内部布局 ─── */

.agent-chat {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.agent-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--kb-border);
  background: var(--kb-bg-secondary);
}

.agent-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.agent-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1a5f7a 0%, #0d3b66 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.agent-meta h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--kb-text);
  line-height: 1.3;
}

.agent-role {
  font-size: 11px;
  color: var(--kb-text-muted);
  display: block;
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.agent-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.agent-model {
  font-size: 11px;
  color: var(--kb-text-muted);
  padding: 2px 8px;
  background: var(--kb-bg-tertiary);
  border-radius: var(--kb-radius);
  font-family: var(--kb-font-mono);
}

.btn-clear,
.btn-config {
  background: none;
  border: none;
  color: var(--kb-text-muted);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--kb-radius);
  font-size: 14px;
  transition: all 0.15s;
}

.btn-clear:hover,
.btn-config:hover {
  background: var(--kb-bg-tertiary);
  color: var(--kb-danger);
}

.model-config {
  display: grid;
  grid-template-columns: 1fr 92px;
  gap: 6px;
  margin-top: 9px;
  padding: 9px;
  border: 1px solid var(--kb-border);
  border-radius: 8px;
  background: var(--kb-bg);
}

.model-config input {
  min-width: 0;
  border: 1px solid var(--kb-border);
  border-radius: 5px;
  padding: 6px 7px;
  background: var(--kb-bg-secondary);
  color: var(--kb-text);
  font-size: 10px;
}

.model-config input:first-child,
.model-config input[type="password"],
.model-config .forgejo-message { grid-column: 1 / -1; }

.model-config button {
  border: 1px solid var(--kb-accent);
  border-radius: 5px;
  background: rgba(88, 166, 255, .12);
  color: var(--kb-text);
  cursor: pointer;
}

.runtime-status {
  padding: 10px 14px;
  border-bottom: 1px solid var(--kb-border);
  background: var(--kb-bg-secondary);
  font-size: 11px;
}

.runtime-row,
.forgejo-title,
.forgejo-actions {
  display: flex;
  align-items: center;
  gap: 7px;
}

.runtime-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
}

.runtime-dot.online { background: #3fb950; box-shadow: 0 0 7px rgba(63, 185, 80, .55); }
.runtime-dot.waiting { background: #d29922; }
.runtime-tools { margin-left: auto; color: var(--kb-text-muted); }

.forgejo-status {
  margin-top: 9px;
  padding: 9px;
  border: 1px solid var(--kb-border);
  border-radius: 8px;
  background: var(--kb-bg);
}

.forgejo-title { justify-content: space-between; margin-bottom: 7px; }
.forgejo-title span,
.forgejo-detail { color: var(--kb-text-muted); }

.forgejo-url {
  width: 100%;
  box-sizing: border-box;
  border: 1px solid var(--kb-border);
  border-radius: 6px;
  padding: 7px 8px;
  background: var(--kb-bg-secondary);
  color: var(--kb-text);
  font-size: 11px;
}

.forgejo-actions { margin-top: 7px; }
.forgejo-actions button {
  flex: 1;
  border: 1px solid var(--kb-border);
  border-radius: 5px;
  padding: 5px 3px;
  background: var(--kb-bg-tertiary);
  color: var(--kb-text);
  cursor: pointer;
  font-size: 10px;
}
.forgejo-actions button:disabled { opacity: .4; cursor: not-allowed; }
.forgejo-detail { margin-top: 6px; }
.forgejo-message { margin-top: 5px; color: var(--kb-accent); word-break: break-word; }

/* ─── 对话区域 ─── */

.agent-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.agent-welcome {
  text-align: center;
  padding: 40px 20px;
}

.welcome-icon {
  font-size: 48px;
  margin-bottom: 12px;
}

.agent-welcome h2 {
  font-size: 18px;
  color: var(--kb-text);
  margin-bottom: 8px;
}

.agent-welcome p {
  color: var(--kb-text-muted);
  font-size: 13px;
  line-height: 1.6;
}

.welcome-hint {
  margin-top: 16px !important;
  font-size: 12px !important;
}

.welcome-suggestions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}

.welcome-suggestions button {
  background: var(--kb-bg-secondary);
  border: 1px solid var(--kb-border);
  color: var(--kb-text);
  padding: 10px 14px;
  border-radius: var(--kb-radius);
  font-size: 13px;
  cursor: pointer;
  text-align: left;
  transition: all 0.15s;
}

.welcome-suggestions button:hover {
  background: var(--kb-bg-tertiary);
  border-color: var(--kb-accent);
}

/* ─── 消息气泡 ─── */

.msg-user-bubble {
  margin-left: auto;
  max-width: 85%;
  background: linear-gradient(135deg, #1a5f7a 0%, #0d4a6b 100%);
  border-radius: 16px 16px 4px 16px;
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.5;
}

.msg-user-bubble p {
  white-space: pre-wrap;
  word-break: break-word;
}

.msg-assistant-bubble {
  display: flex;
  gap: 8px;
  max-width: 90%;
}

.msg-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--kb-bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
  margin-top: 2px;
}

.msg-content {
  flex: 1;
  min-width: 0;
}

.msg-markdown {
  font-size: 13px;
  line-height: 1.6;
  color: var(--kb-text);
}

.msg-markdown p {
  margin-bottom: 8px;
}

.msg-markdown p:last-child {
  margin-bottom: 0;
}

.msg-markdown code {
  background: var(--kb-bg-tertiary);
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 12px;
  font-family: var(--kb-font-mono);
}

.msg-markdown pre {
  background: var(--kb-bg-secondary);
  border: 1px solid var(--kb-border);
  padding: 10px 12px;
  border-radius: var(--kb-radius);
  overflow-x: auto;
  margin: 8px 0;
}

.msg-markdown pre code {
  background: none;
  padding: 0;
}

.msg-markdown ul,
.msg-markdown ol {
  padding-left: 20px;
  margin-bottom: 8px;
}

.msg-markdown li {
  margin-bottom: 4px;
}

.msg-markdown a {
  color: var(--kb-accent);
  text-decoration: none;
}

.msg-markdown a:hover {
  text-decoration: underline;
}

/* ─── 工具调用展示 ─── */

.tool-calls,
.tool-results {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 8px;
}

.tool-call,
.tool-result {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  padding: 4px 8px;
  background: var(--kb-bg-tertiary);
  border-radius: 4px;
  font-size: 11px;
}

.tool-icon {
  flex-shrink: 0;
}

.tool-name {
  font-weight: 600;
  color: var(--kb-accent);
}

.tool-args {
  color: var(--kb-text-muted);
  font-size: 10px;
  word-break: break-all;
}

.tool-result pre {
  font-size: 10px;
  color: var(--kb-text-muted);
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 120px;
  overflow-y: auto;
  font-family: var(--kb-font-mono);
  margin: 0;
  padding: 0;
  background: none;
  border: none;
}

.tool-result.tool-error pre {
  color: var(--kb-danger);
}

/* ─── 输入区 ─── */

.agent-input-area {
  padding: 12px 16px 16px;
  border-top: 1px solid var(--kb-border);
  background: var(--kb-bg-secondary);
}

.agent-input-wrapper {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  background: var(--kb-bg);
  border: 1px solid var(--kb-border);
  border-radius: 12px;
  padding: 8px 12px;
  transition: border-color 0.15s;
}

.agent-input-wrapper:focus-within {
  border-color: var(--kb-accent);
}

.agent-input {
  flex: 1;
  background: none;
  border: none;
  color: var(--kb-text);
  font-size: 13px;
  font-family: var(--kb-font-sans);
  resize: none;
  outline: none;
  min-height: 20px;
  max-height: 120px;
  line-height: 1.5;
}

.agent-input::placeholder {
  color: var(--kb-text-muted);
}

.btn-send {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--kb-accent);
  border: none;
  color: #fff;
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.15s;
}

.btn-send:hover:not(:disabled) {
  background: var(--kb-accent-hover);
}

.btn-send:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.agent-hint {
  margin-top: 6px;
  font-size: 10px;
  color: var(--kb-text-muted);
  text-align: center;
}

/* ─── 加载动画 ─── */

.typing {
  display: flex;
  gap: 4px;
  padding: 8px 0;
}

.typing .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--kb-text-muted);
  animation: typing 1.2s infinite;
}

.typing .dot:nth-child(2) {
  animation-delay: 0.2s;
}

.typing .dot:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes typing {
  0%, 60%, 100% { opacity: 0.3; transform: translateY(0); }
  30% { opacity: 1; transform: translateY(-4px); }
}

/* ─── 响应式 ─── */

@media (max-width: 900px) {
  .kb-agent-panel {
    width: 100%;
    max-width: none;
    border-left: none;
    border-top: 1px solid var(--kb-border);
  }
  
  .kb-body {
    flex-direction: column;
  }
}